Pole-changine jack plug



July 27 1.926.

2 Sheets-Sheet l G. J. ziscH PLE CHANGING JACK PLUG Filed June 18 1924 1 www ATTORI/JE July 27,1926. 1,593,616

G. J. zlscH `POLE CHANGING JACK PLUG Filed June 18, 1924 2 sheets-s111181 2 A Tran/vn.

Patented July'27, 1926.

PATENT OFFICE.

GEORGE J. zIsCH, or WEST ORANGE, NEW JERSEY.

POLE-CHAN GIN G JACK PLUG. i

Applicationled .Tune 18, 1924. Serial No. 720,731.

l In' the operation ot radio-telephone receiving sets, it very Otten occurs that the changing o'rreversing of the receiver' leads will result in clearer and better reception. Again, it is often found that incorrect receiver connections, that is, wrong polarity connections, will result in bleeding the receiver magnet or its permanent magnetism, and

that it will gradually become weaker until it becomes practically useless. To correct this diiculty requires, ordinarily, the shifting ot the leads either at the receiver or at the plug, an operation that consumes time and is otherwise inconvenient; and while it is being done the receiver head set must be removed, s0 that the results of the change cannot bey quickly observed.

The objectv oit'. this invention is to provide a pole changing` device within the plug, so that' current polarity leading to the receiver may be changed, and the results thereby obtained may be observed or listened to without shitting the headsetor changing any other previously made adjustments, thereby affording the important and often necessary time saving element in radio reception.

In the accompanying drawing, three distinct embodiments of the improvement are shown, viz: the switch lever type, the push button type and the swivel type; in each case, the usual outlines ot the plug are retained, and thenecessary operating elements are enclosed within the contour of the plug handle. In the drawing,

Figure 1 is a longitudinal sectional view of a plug, showing the pole-changing mechanism within the handle.

Figure 2 is an edge view of the plug.

Figure 3 is a sectional view of a plug of v the push button type.

Figure t is an edge view of the same.

Figure 5 is a plan View ot a plug of the swivel type.

Figure 6 is a longitudinal sectional view of vthe ysame taken at right angles to the v tace'.

' the usual shape, the handle consisting of a pair of mating disk sections 1, 2, each otl which is recessed s0 as to form a hollow interior to contain the operative parts. The sections 1, 2 are held together by a screw bolt 3, and are made of suitable insulating material, molded to shape, with semi-cylindrical recesses 1l, 5 formed therein to secure the sockets 6in place and also a recess7, in which the plug terminals are secured.

rthe sockets 5, 6 are each provided with Hat extension contacts 8, 9. The plug terminal consists o1 a tubular electrode 10, Secured in the recess 7, and having at its inner enda two armed contact 11, in alignment with, but spaced away from, the ends of the contacts 8, 9.

The electrode 12, extends through the tube 10 with insulation 13, 14 at the ends as shown, and terminates at the inner end in a T-shaped contact 15, the ends of which are in alignment with, but spaced away trom the contacts 8, 9, and has at the outer en d a terminal head 16.

Pivoted to the handle section 2 isy a lever 17, oli-insulating material, having one end` extending out through the slot 18; the lever swings between the contacts 8, 9 and the electrode contacts 11 and 15, and is provided with metal contact ferrules 19, 20, in position t0 engage the several contacts as the lever is swung from one position to the other.

Assuming that current enters the plug through the electrode 10, it will be noted that al metallic path is open to it by way ot contact l1, terrule 20, extension contact 9, socket 6, to the lead wire 21 to the receiver or other instrument in circuit, returning through the lead wire 22, socket 5, extension contact 8, ferrule 19, contact 15, to electrode-12, terminal head 16, and so back to the source of current. By shifting the leverl 17, to the dotted line position shown, the direction of the current will be reversed through the lead wires 21, 22, as will be readily seen by retracing the metallic line.

Thus, by shitting the lever 17, the direction of the current through the lead wires may be changed as often as desired without otherwise shifting any of the external con nections.

1n the form shown in Figs. 3 and 4, the same results may be obtained by shifting the insulating push rod 17 endwise thrpugh the body of the handle. On the push rod two L-shaped contacts 19', 20 are secured in 'lll position to make contact with the contacts t, 9, the two-armed contact ll', and the contact 15, thereby accomplishing the same results as above described.

In the form shown in Figs. 5, G and 7, the handle is made up ot the two halt disk sections Q3, 2st, pivotally connected by the shouldered bolt so that the section 28 may swivel upon the section In order that the two sections may be yieldingly secured together, the boit has a long shank extending into a socket 26, with the coiled spring i??? surroundingl the shank ot the bolt between its head and the bottom o'l the socket. The section 2?; has two lead sockets QS, 29, to receive the plugs on the ends ot the two lead wires 30, 3l. lsaid sockets beingr molded into the composition trom which t-he section is made and having their lower ends tlush with the tlat tace ot the section. The other section 21' has the ping molded therein, with the electrode 32 within and insulated `troni the tubular electrode by the insulation 3ft,

The electrode 3Q has a lateral arm 36 secured to its inner end, from which a socket' contact 3i' extends to the dat tace ot the section. with the spring 3S and contact ball 39 in said socket contact, in position to engage a slight indentation in the inner end ot the lead socket 29.

The tubular electrode 2323 is provided with a lateral arm 4t) tor engagement with an indentation in the inner end ot the lead socket. When the section Q3 is given a half turn about the bolt 25 the two lead sockets QS, 29 will be shifted to contact respectively with the contact balls t3 and 39, thereby changing the current direction in the lead wires 30,' 31.

In the form shown in Figs. 8, 9, the general contour of the structure is retained but the internal connections are slightly moditied. The handle 50 is made up of two discs 5l. connected together b v rivets so as to torn: an internal recess 54. 'l`wo lead sockets .35, 5G. and a plug' terminal 57, are inserted between the two sections 5l, 52 in rece 5 s provided therefor. and held in place by means of the rivets lateral aperture is formed between the two sections 5l, through which the push pin pole changer is mounted to slide back and forth. The two sockets 5G, into which the circuit lead terminals are inserted, are provided with gripping dogs, 59, G0, said gripping dogs heilig respectively pivoted upon certain ot the rivets 53. The sockets are each provided with a lateral slot (il into which the eccentric disc-like end 62, ot the dog projects tor engagement with the lead terminal as T. rlhe dogs have extending arms, so that they7 may be gripped between the thumb and linger and simultaneously release both ot the lead terminals. In order that the lead terminals may be held within the sockets against accidental displacement, each of the dogs is provided with a flat spring 63, 64. extending downwardly7 and inwardly with upturned end bearing upon a contact section ot' the push pin 58, rThese springs (325, G1. therefore constitute connections between the plug terminal contact elements 65, GG and the lead sockets 56.

The push pin pole changer is made up of the central rod (3T. screw thr aded at its ends and having mounted at its middle an insulating collar G8. On each side of the collar G3 is an insulating' tube (if), outside otl which arc the tabular connectors Tt). Tl. connectors are held rigidly in place by the insulating end pieces 72, 73 which are screwed on to the screw threaded ends ott the rod GT, the whole Aforming a push pin ot' cylindrical outline ot a size to be received into the aperture lormed between the two sections 5t, The two tubular contact sections TU, 'Tl are so shaped and positioned as to attord a circuit through the device as follows. assumingl the parts to be in the po sition shown in Fig. S: from the tubular electrode ot the tern'iinal 5T, through the spring extension (35 to the contact Tt), thence through spring 63, dog 59, socket 55 and out through the lead terminal T inserted therein through the translatingr device D. whatever it may be, returning through the other lead terminal T and the socket 56, dog titl, spring (tttubnlar contact Tl, spring contact 6G, to the other plug electrode. On reversing the position ot the push pin, the direction of that portion ot the current between the sockets 55, 56, will be reversed as will be understood.

The provision ot' the gripping dogs 59, G0 ati'ords an added convenience to the device and insures the electric connection of the plug in the circuit against accidental displacement, at the saine time rendering the detachment ot' the lead terminals vtroni thc plug a very simple operation; namely, that ot' pinching together the operating arms of the dogs 59, (it). Gripping devices ot' the same character may be applied to the other terms ot plug, it desired and it is not deemed necessary to illustrate or further describe them.

From the 'foregoing description it will be seen thaty by the use of any one ot' the forms oi jack plugs, the current direction through the lead wires may be quickly and c0nven iently changed without disconnecting any of the lead wire connections.

`While the device as described is especially adapted for use in changing the current polarit;v ot' telephone receivers, yet I do not wish to contine it to that use alone since it may be used in any relation Where it is necessary or desirable to change or reverse current polarity.

These two H1 The forms shown and described illustrate the embodiment or" my invention yet the principle of the invention is readily capable of embodiment in other forms which come within the scope and intent of the appended claims.

I claim:-

vl. A jack plug comprising a handle, composed of two equal parts, receiver sockets engaged in said handle, a plug comprising concentric electrodes extending within said sectional handle and means within said handle whereby said electrodes may be alternately connected respectively with said sockets.

2. A jack plug comprising a handle having a pair of uniform mating sections sec-ured together, conductor sockets and a plug having concentric electrodes extending into the body of said handle and means located between the sections of said handle for electrically connecting each of said electrodes selectively with each of said sockets.

3. A jack plug comprising a handle composed of'two duplicate sections having a chamber therebetween, a pair of sockets extending into the chamber, a pair ot' concentric positive and negative electrodes forming a plug both electrodes extending into the chamber in said handle, and means operative within said handle tor alternately connecting said electrodes with said sockets for effecting a change ot polarity in said sockets.

' 4. A jack plug comprising a pair of mating disk sections, means for rigidly securing said sections together to form a plug handle, a pair of conductor receiving sockets clamped between said sections, each having an extension contact thereon, a pair of concentrcally mounted and electrically insulated electrodes forming a plug clamped between said sections, each of said electrodes being provided with an extension contact, and means located between said sections for alternately connecting the extension contacts of said electrodes respectively with each of said contact extensions, whereby the polarity of said sockets may be reversed at will.

5. A jack plug comprising a cylindrical handle having flat sides, receiver sockets within said handle, a plug comprising concentric positive and negative electrodes extending from within said handle, means within said handle extending outwardly for manipulation for alternately connecting said electrodes respectively with said sockets, and means for detachably gripping an external lead terminal in each of said sockets.

6. A jack plug comprising a sectional handle, receiver sockets within said handle, a plug comprising concentric electrodes extending within said sectional handle, means movably within said handle whereby said electrodes may be alternately connected respectively with said sockets, and means for detachably gripping a terminal in each of said sockets.

7. A jack plug comprising a pair of mating sections secured together to constitute a handle, sockets and a plug having two electrodes extending into the body of said handle, means located between said sections of said handle tor electrically connecting each of said electrodes alternately with each of saidsockets, and means for detachably grip-, ping an external terminal in each of said sockets.

8. A jack plug comprising a sectional handle, a pair of sockets extending into said handle, a pair of concentric positive and negative electrodes forming a. plug extending from within said handle, and a bar slidably connected with said handle for alternately connecting said electrodes with said lead sockets for effecting a change of polarity in said sockets.

9. A jack plug comprising a pair of mating disc sections, means for rigidly securing said sections together to form a plug handle, a pair of receiving sockets clamped between said sections, each having an extension contact thereon, a pair of concentrically mounted and electrically insulated electrodes forming a plug clamped between said sections, each of said electrodes being provided with an extension contact, a bar slidable between said sections foralternately connecting the extension contacts of said electrodes respectively with each of said contact extensions, whereby the polarity of said lead sockets may be reversed at will.

GEORGE J. ZISCH. 

